Jump to content

Rap How-to On Nbs (keyed Accessory Power)

Diesail

By Diesail
in Audio, Electronics & Software

 Share

Recommended Posts

  • Replies 85
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Diesail
Diesail

The question of where to locate RAP (Retained Accessory Power) on the NBS trucks seems to come up often so I thought I would post this info for everybody. RAP is available to us in the MBEC (Mid-Buss

Posted Images

Diesail Enthusiast

Diesail

Posted
  • Author
Posted

I used a relay with a mounting tab and simply ran a wire tie through the tab and around one of the larger wire bundles up and under the dash.

mopester Enthusiast

mopester

Posted
Posted

Just hooked everything up and the headrest monitors are not powering up...? I got all the wires in the right place... The only thing extra I did was extended the yellow wire so it could reach the headrest monitors' power wires. I also want to power the cigarette power outlet on my center console that I recently purchased but I don't know... Am I missing something here? I have the LS(WT) version of Silverado by the way. Any help would be appreciated.

Diesail Enthusiast

Diesail

Posted
  • Author
Posted
Just hooked everything up and the headrest monitors are not powering up...? I got all the wires in the right place... The only thing extra I did was extended the yellow wire so it could reach the headrest monitors' power wires. I also want to power the cigarette power outlet on my center console that I recently purchased but I don't know... Am I missing something here? I have the LS(WT) version of Silverado by the way. Any help would be appreciated.

 

 

Sounds like it is time to break out the test lamp or meter and start checking where you have power. The blue wire should have power ALL the time. If there is no power then you blew fuse or have the wrong pin. The Wite wire should only have power when RAP is pressent. But becare not to connect anything more than a meter, test light or relay to this pin as you can do damage if you overload it. Then check your ground wire as well as the output of the relay.

mopester Enthusiast

mopester

Posted
Posted

Ok, checked the fuse for MBEC and it's not blown. I tried powering the center console cigarette outlet with just the blue wire and it won't come on. Could it be possible that my truck is not wired for this? If this doesn't work, where else can I tap in so I can use my headrest monitors?

mopester Enthusiast

mopester

Posted
Posted

I can't believe it. I finally had both of the monitors working with RAP and everything. But when I went to make the final connection and tuck in all the wires, something happened and now they are not powering on... The MBEC fuse is fine and both the fuses for my monitors are still good. Maybe something happened and the relay got busted....?

mopester Enthusiast

mopester

Posted
Posted

Found out what the problem was. The fuses on the monitor power wires were blown, except they were blown at the edge, not the center. So I could not physically see that they were blown until I put the tester on them. I'll be finishing up on the monitor install tomorrow.

Diesail Enthusiast

Diesail

Posted
  • Author
Posted

Glad to hear it worked out for you. When doing this sorta project a test, whether a simple lamp or a multi-meter, is key. Being able to test along the whole circuit for voltage can save a lot of time and hair.

Bill in Niantic Enthusiast

Bill in Niantic

Posted
Posted

I completed the installation and it works fine.

But I am not sure where the 15 and 30 fuses are located for those pins in the MBEC box.

Can you advise please?

silveradope Enthusiast

silveradope

Posted
Posted

got my xm powered up with your help in this post.

Thank you sooooo much!!!

everything is working great. now my next project is to get the xm antenna tied into the truck truck antenna.

awsome post!!

thanks for your help.

Diesail Enthusiast

Diesail

Posted
  • Author
Posted
I completed the installation and it works fine.

But I am not sure where the 15 and 30 fuses are located for those pins in the MBEC box.

Can you advise please?

 

 

They are located in the underhood fuse block. They 15 amp circuit is labeled SEO B1 and the 30 amp fuse is SEO B2.

FRANKD3TANK Enthusiast

FRANKD3TANK

Posted
Posted

Diesail, would this be an ideal place to hook up this relay ive been needing to install in my stereo? My stereo always dies after about an hour of usage and the only way to get it to work again is if i shut the truck off. The module already works with the RAP, so that would mean that i dont need to go through the RAP again for the fused 12v source shown on the relay right? The relay is shown on page 4.

 

 

 

 

Page 1-4

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,759
    Total Members
    8,960
    Most Online
    DM22
    Newest Member
    DM22
    Joined

  • Who's Online   2 Members, 0 Anonymous, 2,978 Guests (See full list)

  • Latest Articles

  • Posts

    • dna9656
      No low range 4 x 4

      By dna9656 · Posted

      My 2015 1500 LTZ Silverado suddenly won't go into 4 x 4 low. It will go into 4 x 4 high.
    • asilverblazer
      Transmission Woes :-(

      By asilverblazer · Posted

      Yep, just a quick reference point.    My main point being I’d do a thousand other things before I’d pay 10k for a transmission.    Speaking in ignorance cause I don’t look at these trucks, what is it worth? 20k?
    • asilverblazer
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By asilverblazer · Posted

      I think users are going to want to pick their monitored parameters, which parameters they want to see first.    It should probably start with baseline at a minimum and adjust to learned, but be able to overlay baseline for comparison.   A simple severity level would be able to determine what type of alerting is appropriate or user selectable.    Why not use the OBD port though?   I think a phone connection would be a good idea, push notifications type deal.   Number 1 issue is having data is useless if you don’t know what the data should be under normal conditions. 
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I thought I would use your thread and add to it as I just did my first longer drive with my truck in the last couple of days. I drove from the Grande Prairie area of Alberta down to Edmonton and most of where I drove in the city was the ring road so fairly free flowing but a bit of stop and go as well in the city. Stayed the night and returned home and not too many stops along the way each way but every restart and certainly every cold start sets it back for fuel mileage. Why I say that is I see some people will cherry pick a fuel mileage leg after the vehicle had been warmed up driveline wise before hand and its a forgiving ( easy rolling drive leg for example ) and call that their fuel mileage which can give a false perception of reality. I was not heavily loaded at all but never the less the flip bak cover, rubber bed mat, various tools etc and extra jerry cans of fuel all way up to a few hundred pounds of dead weight so its not an empty truck. The cold inflation tire pressures are set more near the freezing point so once they are warmed up driving I was showing 45 front and over 40 rear and realize high inflation pressures would help a little in fuel mileage but certainly not the ride on our crap sections of highway. The weather was good so was not raining as that can really drag mileage down, in fact I had a bit of a tail wind on average driving home. Most people on here would never have driven on that freeway to visualize it but its got a fair bit of rolling type of landscape with numerous river valleys. For the most part I had it on cruise set to 62 although kicking it off if I caught it in time before it started down shifting and self braking going down the grades. Most of the more substantial grades its shifting into 7th I believe as 8th just doesn't have it. Total distance round trip was 643 miles and my overall average and I did refuel three times in all, figured out to 17.65 miles per US gallon. My best fuel mileage section refuel within all of this figured out to 18.46 and these are all hand calculated figures. I find if anything that the trucks computer can be over optimistic, sometimes its pretty close but other times its stretching it. On paper persay in theory the truck would have just about made it on fumes for that whole drive without refueling once.    Which made me think of the topic thread of the wonder if these trucks could do 20 mpg and that is a good question, certainly would have to be on an easy going flat highway, no head wind, the right temperature, not packing around a bunch of dead weight and puttering along even slower than I was I would suspect and going steady and not stopping to smell the flowers or take a piss !. It probably is possible but not without effort to attain that with the wind resistance and weight of these trucks. Of course on my drive most people are passing me if they have the power as per loaded highway tractors, never mind a lot of speedy vehicles but the speed limit is 68 and most are at or well over that. 
    • Aimatdeer
      Ac not keeping up

      By Aimatdeer · Posted

      Monday looks like a good day for the dealer to test an ac issue. Hopefully it all turns out good.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...